republican mitt romney argued that he would do a better job leading the country's economy. at his first step in wisconsin, president obama appealed for another term in office to finish the job he started. a short time ago, he was given the backing of new york's mayor michael bloomberg, who endorsed the president's citing specifically the issue of climate change. i ask the political reporter for the "washington post" what he would be watching out for. we're entering the portion of the campaign where i start to the people who run for president just have a different team than the rest of us -- different gene than the rest of us. >> there is no doubt about that, but this is an incredibly close election at this point. a lot of people predicted this a year ago, that it would be close, and they've got the election they anticipated. a handful of states will decide if the candid -- will decide it. candidates will be in and out of the state's multiple times. >> what can they actually do at this stage? barack obama, mitt romney, to try to persuade people after two years of campaigning